backstage
Definitions
The area in a theater behind the stage, including dressing rooms and wings, not visible to the audience.
Relating to or occurring in the private or non-public areas of an organization or event.
In a manner that is hidden from public view or behind the scenes.
Examples
The band members relaxed in the backstage area before their final performance.
She managed to get a backstage pass to meet her favorite singer after the concert.